53878403 ÷ 517 
Our goal is to divide 53878403 by 517.

Moving on to step 1:
517 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 517

Advancing to step 2:
The number 517 fits into 53 0 times, leaving a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 517

Advancing to step 3:
538 divided by 517 is 1 with a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 517 from 538 leaves us with 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 517

Advancing to step 4:
517 goes into 217 0 times with a remainder of 217.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 217, we get 217.
Include the next digit (8) from the dividend after 217, then repeat: 2178 / 517

Moving on to step 5:
2178 divided by 517 is 4 with a remainder of 110.
Write down 4 as next digit of the result. 
Result so far: 104.0
Subtract 2068 from 2178 to get 110.
Include the next digit (4) from the dividend after 110, then repeat: 1104 / 517

On to step 6:
If we divide 1104 by 517, we get 2 and a remainder of 70.
Record the quotient 2 as the next digit in the result. 
Result so far: 1042.0
Subtracting 1034 from 1104 leaves us with 70.
Include the next digit (0) from the dividend after 70, then repeat: 700 / 517

Let's proceed to step 7:
517 can be fit into 700 1 times, resulting in a remainder of 183.
The next digit of our result is 1. 
Result so far: 10421.0
If we take 517 away from 700, we end up with 183.
Include the next digit (3) from the dividend after 183, then repeat: 1833 / 517

Going ahead to step 8:
If we divide 1833 by 517, we get 3 and a remainder of 282.
Put 3 as the next digit of the answer. 
Result so far: 104213.0
Subtracting 1551 from 1833 leaves us with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Let's proceed to step 9:
The number 517 fits into 2820 5 times, leaving a remainder of 235.
The number 5 becomes the next digit in our result. 
Result so far: 104213.5
Deduct 2585 from 2820 and we're left with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 10:
The number 517 fits into 2350 4 times, leaving a remainder of 282.
Put 4 as the next digit of the answer. 
Result so far: 104213.54
If we subtract 2068 from 2350, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Step 11:
517 can be fit into 2820 5 times, resulting in a remainder of 235.
Write down 5 as next digit of the result. 
Result so far: 104213.545
Deduct 2585 from 2820 and we're left with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 12:
When dividing 2350 by 517, we get 4 with a remainder of 282.
Use 4 as the next digit of our solution. 
Result so far: 104213.5454
If we take 2068 away from 2350, we end up with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Moving on to step 13:
If we divide 2820 by 517, we get 5 and a remainder of 235.
Write down 5 as next digit of the result. 
Result so far: 104213.54545
If we take 2585 away from 2820, we end up with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Let's proceed to step 14:
When dividing 2350 by 517, we get 4 with a remainder of 282.
Use 4 as the next digit of our solution. 
Result so far: 104213.545454
Deduct 2068 from 2350 and we're left with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Step 15:
2820 divided by 517 is 5 with a remainder of 235.
Use 5 as the next digit of our solution. 
Result so far: 104213.5454545
Subtracting 2585 from 2820 leaves us with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 16:
517 can be fit into 2350 4 times, resulting in a remainder of 282.
The next digit of our result is 4. 
Result so far: 104213.54545454
Deduct 2068 from 2350 and we're left with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

The quotient of the division is 104213.54545454, and the remainder is 2.82e-07.